Cardboard box



FIG. 1 is a perspective view of the cardboard box showing my new design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIGS. 4 and 5 are side elevation views thereof.

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top plan view thereof.

The broken lines shown in the drawings illustrate portions of thecardboard box that form no part of the claimed design.

CLAIM The ornamental design for a cardboard box, as shown and described.